This is a easy tutorial of Pepper expansion.Hi I am dheeraj this is a mad science tutorial this is very easy I'll tell you more of experiments lets start .Before starting how does this work this actually it works on principle of surface tension. Surface tension holds the surface molecules of liquids tightly. So the pepper particles when soap applied , they get moved when molecules are Holden tightly.Lets Do this :D

In this video i wanted to show how the railway signal works. Sorry for a poor quality, this is my first video on youtube. Interesting thing. When train is approaching to the road crossing, signal immediately turns on. The secret is that there is a signal coming through the rails, and when train is near, it close this signal and siren starting work.

Are the kids bored? Need something for a school project? Want a great activity for a family night? In this tutorial I am going to show you how to make slime! This easy slime recipe only requires 3 basic everyday household ingredients, with an optional 1 or 2 more ingredients. The slime is non-toxic and super safe to play with. Don't eat it though! So let's get to it, let's make some slime!

We can use DVD Drive to generate small amount of current and can light two or three LED. The trick simply is DVD Drive contains a motor inside it when dismantle the DVD Drive we can rotate that motor by sliding one of the DVD drive part. Thus after rotation in motor it generates very small amount of electricity and we can light up LED. Watch the video how to disassemble the DVD Drive learn the trick and share with your friends.

I would like to make the explosive polymerization with p-nitro aniline and sulfuric acid. I work in a laboratory and have access to the chemicals. I have seen several videos on Youtube and it looks awesome... When I try nothing happens, even after 10 minutes of heating. I have mixed 2 sp of the aniline and approximately 1 ml acid. I heat with a bunsen burner. Any good suggestions why it won't work? Best regards Jørgen